Não estou conseguindo testar o controller - pode me ajudar?

package br.com.alura.adopet.controller;

import static org.junit.jupiter.api.Assertions.assertEquals;

import org.junit.jupiter.api.Test;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.mock.mockito.MockBean;
import org.springframework.http.MediaType;
import org.springframework.test.web.servlet.MockMvc;
import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
import br.com.alura.adopet.api.AdopetApiApplication;
import br.com.alura.adopet.api.service.AdocaoService;

@SpringBootTest(classes = AdopetApiApplication.class)
@AutoConfigureMockMvc
public class AdocaoControllerTest {

    @Autowired
    private MockMvc mvc;

    @MockBean
    private AdocaoService adocaoService;

    @Test
    void solicitar_WithInvalidData_ShouldReturnCode400() throws Exception {
        //Arrange
        String json = "{}";

        //Act
        var response = mvc.perform(MockMvcRequestBuilders
            .post("/adocoes")
            .content(json)
            .contentType(MediaType.APPLICATION_JSON)
        ).andReturn().getResponse();

        //Assert
        assertEquals(400, response.getStatus());

    }

}

Subi o mysql no Docker:

version: '3.8'

services:
  mysql:
    image: mysql:8.0
    container_name: mysql-adopet
    environment:
      MYSQL_ROOT_PASSWORD: root
      MYSQL_DATABASE: adopet
      MYSQL_USER: root
      MYSQL_PASSWORD: root
    ports:
      - "3306:3306"

application.properties:

spring.datasource.url=jdbc:mysql://localhost/adopet?createDatabaseIfNotExist=true
spring.datasource.username=root
spring.datasource.password=root

spring.mail.host=smtp.example.com
spring.mail.port=587
spring.mail.username=username
spring.mail.password=password
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true

Erro: